Table 8.
Regression coefficient estimates, estimated standard deviations and confidence intervals based on the asymptotic normal distribution when interaction terms are included in the model for the aortic insufficiency data
| Estimate | EF | Gender | Age | Surgery | Surgery | EF  Surgery |
EF  Surgery |
|---|---|---|---|---|---|---|---|
| (stand.) |
months |
months |
months |
months |
|||
| Naive | -6.73 | 0.71 | 1.27 | -4.33 | -2.36 | 8.56 | 3.17 |
| (Estimated SD) | (2.16) | (0.27) | (0.19) | (1.43) | (1.38) | (2.74) | (2.72) |
| 95% C.I. (lower bound) | -11.04 | 0.17 | 0.88 | -7.19 | -5.11 | 3.08 | -2.28 |
| 95% C.I. (upper bound) | -2.41 | 1.26 | 1.65 | -1.48 | 0.40 | 14.05 | 8.62 |
Simex ( ) |
-7.59 | 0.72 | 1.27 | -5.10 | -2.63 | 9.96 | 3.68 |
Simex ( ) |
-10.56 | 0.77 | 1.27 | -7.01 | -3.10 | 13.62 | 4.65 |
SD, standard deviation; C.I., confidence interval; EF, ejection fraction.